During the warmer months, it is common to find signs of intervention in the green areas of cities, with the aim of controlling pests that affect both flora and fauna. Among these measurements, an image that can cause strangeness is a black bag hanging from a tree. This method, although simple, has an important function in combating a recurring threat.
Hanging black bag
In various locations, both in Portugal and other European countries, especially with the arrival of summer, black bags are beginning to emerge around trees. These bags act as ecological traps and are a measure to control the oak caterpillar, a species that becomes especially active at this time of year.
His presence in parks and gardens has been increasing, leading to the need for containment actions that do not harm the environment. Contact with these caterpillars can be harmful to people, animals and plants, hence the importance of avoiding the zone where the bags are located, according to the news work.
These bags should not be removed. Its placement and maintenance are the responsibility of specialized professionals. Walking by trees with these traps should also be avoided for safety reasons.
How this trap works
The trap is made up of a black bag with an opening through which the caterpillars enter, attracted by Pheromonas. Inside, there is a dark chamber where insects are trapped.
Solar heat warms the interior of the bag, causing caterpillars drying without chemicals, according to the same source. Thus, the use of pesticides is avoided, which can impair other species and the ecosystem itself.
To increase their effectiveness, the bags are often reinforced with sand, preventing the wind from moving them or damaging them.
The risks associated with the oak caterpillar
This caterpillar has microscopic with inflammatory properties. Simple contact with the skin can cause allergic reactions, itching, rash and, in some cases, breathing difficulties if they are inhaled.
These effects do not only affect humans. Domestic animals, such as dogs, can be serious when inhaling or touching these by the tours.
In case of accidental contact, as the same source refers, it is advisable to wash the skin, hair and clothing well. If symptoms persist, it is advisable to seek medical attention.
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Examples of measures in other countries
In cities like Colonia, Germany, this plague has had an impact on green spaces. Authorities have adopted mixed strategies that combine fumigations on roads and traps such as black bags.
Cooperation between municipal services, environmental technicians and inhabitants has existed to try to reduce the damage caused by the caterpillar.
Advantages of ecological methods
The use of traps like black bags represents a sustainable alternative to pesticides. Thus avoid contamination of the soil, water and the destruction of insects, as referred to in the same source.
The application of natural solutions contributes to the preservation of public health, while protecting urban ecosystems. When avoiding toxic substances, it also increases safety for those who go to green spaces, whether adults, children or pets.
The role of sensitization and prevention
The correct information and the sensitization of the population are essential elements for the success of these measures. Knowing how to identify the signs of the presence of the caterpillar and respect the intervention zones helps to prevent accidents, according to the.
It is also up to local authorities to ensure effective risks and precautions to be taken. Continuous surveillance allows you to identify outbreaks of infestation and act quickly.
With a concerted approach, it is possible to minimize the impact of this seasonal pest and protect the green spaces that are part of urban daily life.
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